Basil Dark Opal Herb Seeds


  • Suitable as microgreens and herbs.
  • Aromatic basil variety.
  • Rich red-purple leaves.
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Basil Dark Opal Herb Seeds – Bulk & Heirloom

  • Sweet aniseed flavour.
  • Stunning dark purple foliage.
  • Suitable for container growing.

How to Grow Basil Dark Opal Herbs

  • Space plants: 25 cm.
  • Space rows: 30 – 50 cm.
  • Sowing depth: 0.5 cm.
  • Height: Compact, approximately 40 cm.
  • Annual, frost tender variety.
  • Germination: 5-10 days @ 18-21°C.
  • Maturity: 70 days.
  • Tropics: Plant all year.
  • Subtropics: Aug – Jan.
  • Mild climate: Sept – Dec.
  • Frost & cold climate: Sept – Jan.
  • Keep well watered. Moist, well-drained soil.

How to Grow Basil Microgreens

  • Do not pre-soak seeds.
  • Moisten soil, flatten 3-4 cm soil in tray.
  • Cover for 4-6 days with tray lid. Store in .well ventilated area away from light until the seeds germinate. Lightly water 1-2 times daily.
  • Uncover and place in light. Water 1-2 times daily.
  • Harvest time: Approximately 12-16 days.


  • Botanical name: Ocimum basilicum.
  • Variety: Dark Opal (heirloom).
  • Non-GMO.
  • Open-pollinated.
  • No chemical treatment,
  • Seeds per gram: 500-1000.
  • We do not ship to WA or Tasmania due to quarantine restrictions.


Seed Germination Guarantee

Seed Guarantee

Our seeds come with a satisfactory germination rate guarantee for 3 months from date of purchase if stored correctly. Store seeds in a cool, dry place (under 10°C) or in an airtight container in the fridge. Do not expose to moisture or direct sunlight.